Sheet metal screws are often used for HVAC (duct work), metal window frames, automotive repairs, and sheet metal applications as well as plastic applications. Phillips II Plus Sheet Metal Screws were designed as interior screws for these types of applications.
A self-drilling point pierces the metal without buckling it. This feature is needed when drilling through heavy-gauge steel.
The hex head can be installed using a standard nut driver; however both the pan head and the hex head have the patented ACR.
ACR stands for anti-cam-out recess. There are ribs on the driver bit that engage the patented recess to reduce stripping, provide increased torque, enhance off-angle drivability, and offer a stick fit that makes screw driving easier. Phillips II Plus Screws can be driven with a standard square bit, a Phillips Bit, and a Phillips II Plus Bit. For the features of the patented ACR system, we recommend the Phillips II Plus Bit that is included.